Riding mower



FIG. 1 is a left side elevational view of a riding mower, showing my newdesign;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a top plan view thereof.

The broken line showing of the rest of the mower is for illustrativepurposes only, and forms no part of the claimed design.

The ornamental design for a riding mower, as shown and described.